Mwendwa was taken for questioning regarding the Ksh244 million allocated to Harambee Stars when they honoured the 2019 African Cup of Nations (Afcon) in Egypt.
FKF has always been put to task over the use of the money and whether it was used for the right purposes.
Officials said he was accompanied by the federation officials when he arrived at the DCI headquarters.
Mwendwa’s tenure at FKF ended on 10 February 2020 but he has maintained he is still in office until a new president is elected despite a ruling by the Sports Disputes Tribunal (SDT) finding that the term of the National Executive Committee which he was part of (according to article 37 (a) of the FKF Constitution 2017) had ended.
A ruling on whether or not he is in contempt of the tribunal and the way forward for the controversial FKF elections is expected.